from PyQt5 import QtCore, QtGui
import numpy as num
import os

from .base import (RectangularSourceROI, PointSourceROI, SourceDelegate,
                   SourceEditDialog)
from kite.sources import (PyrockoRectangularSource,
                          PyrockoMomentTensor, PyrockoDoubleCouple,
                          PyrockoRingfaultSource, PyrockoVLVDSource)

from ..config import getConfig

d2r = num.pi / 180.
r2d = 180. / num.pi


class PyrockoSourceDialog(SourceEditDialog):

    def __init__(self, delegate, ui_file, *args, **kwargs):
        SourceEditDialog.__init__(self, delegate, ui_file, *args, **kwargs)

        self.completer = QtGui.QCompleter()
        self.completer_model = QtGui.QFileSystemModel(self.completer)
        self.completer.setModel(self.completer_model)
        self.completer.setMaxVisibleItems(8)

        self.chooseStoreDirButton.released.connect(
            self.chooseStoreDir)

        self.completer_model.setRootPath('')
        self.completer.setParent(self.store_dir)
        self.store_dir.setCompleter(self.completer)

        self.store_dir.setValue = self.store_dir.setText
        self.store_dir.value = self.store_dir.text

        self.getSourceParameters()

    @QtCore.pyqtSlot()
    def chooseStoreDir(self):
        folder = QtGui.QFileDialog.getExistingDirectory(
            self, 'Open Pyrocko GF Store', os.getcwd())
        if folder != '':
            self.store_dir.setText(folder)


class PyrockoRectangularSourceDelegate(SourceDelegate):

    __represents__ = 'PyrockoRectangularSource'

    display_backend = 'pyrocko'
    display_name = 'RectangularSource'

    parameters = ['easting', 'northing', 'width', 'length', 'depth',
                  'slip', 'strike', 'dip', 'rake', 'store_dir',
                  'decimation_factor']
    ro_parameters = []

    class RectangularSourceDialog(PyrockoSourceDialog):

        def __init__(self, *args, **kwargs):
            PyrockoSourceDialog.__init__(
                self, ui_file='pyrocko_rectangular_source.ui', *args, **kwargs)

    ROIWidget = RectangularSourceROI
    EditDialog = RectangularSourceDialog

    @staticmethod
    def getRepresentedSource(sandbox):
        length = 5000.
        return PyrockoRectangularSource(
            depth=4000,
            length=length,
            width=15. * length**.66,
            strike=45.,
            rake=0,
            slip=2,
            store_dir=getConfig().default_gf_dir or '')

    def formatListItem(self):
        item = '''
<span style="font-weight: bold; font-style: oblique">
    {idx}. {delegate.display_name}
    <span style="color: #616161;">
        ({delegate.display_backend})
    </span>
</span>
<table style="color: #616161; font-size: small;">
<tr>
    <td>Depth:</td><td>{source.depth:.2f} m</td>
</tr><tr>
    <td>Width:</td><td>{source.width:.2f} m</td>
</tr><tr>
    <td>Length:</td><td>{source.length:.2f} m</td>
</tr><tr>
    <td>Strike:</td><td>{source.strike:.2f}&deg;</td>
</tr><tr>
    <td>Dip:</td><td>{source.dip:.2f}&deg;</td>
</tr><tr>
    <td>Rake:</td><td>{source.rake:.2f}&deg;</td>
</tr><tr style="font-weight: bold;">
    <td>Slip:</td><td>{source.slip:.2f} m</td>
</tr></table>
'''
        return item.format(idx=self.index.row()+1,
                           delegate=self,
                           source=self.source)


class PyrockoMomentTensorDelegate(SourceDelegate):

    __represents__ = 'PyrockoMomentTensor'

    display_backend = 'pyrocko'
    display_name = 'MomentTensor'

    parameters = ['easting', 'northing', 'depth', 'store_dir',
                  'mnn', 'mee', 'mdd', 'mne', 'mnd', 'med']
    ro_parameters = []

    class MomentTensorDialog(PyrockoSourceDialog):

        scaling_params = ['mnn', 'mee', 'mdd', 'mne', 'mnd', 'med']

        def __init__(self, *args, **kwargs):
            PyrockoSourceDialog.__init__(
                self, ui_file='pyrocko_moment_tensor.ui', *args, **kwargs)

        @QtCore.pyqtSlot()
        def setSourceParameters(self):
            params = {}
            scale = float('1e%d' % self.exponent.value())
            for param in self.delegate.parameters:
                params[param] = self.__getattribute__(param).value()
                if param in self.scaling_params:
                    params[param] = params[param] * scale
            self.delegate.updateModelParameters(params)

        @QtCore.pyqtSlot()
        def getSourceParameters(self):
            params = self.delegate.getSourceParameters()
            exponent = num.log10(
                num.max([v for k, v in params.items()
                         if k in self.scaling_params]))
            scale = float('1e%d' % int(exponent))

            for param, value in params.items():
                if param in self.scaling_params:
                    self.__getattribute__(param).setValue(value / scale)
                else:
                    self.__getattribute__(param).setValue(value)

    ROIWidget = PointSourceROI
    EditDialog = MomentTensorDialog

    @staticmethod
    def getRepresentedSource(sandbox):
        return PyrockoMomentTensor(
            store_dir=getConfig().default_gf_dir or '')

    def formatListItem(self):
        item = '''
<span style="font-weight: bold; font-style: oblique">
    {idx}. {delegate.display_name}
    <span style="color: #616161;">
        ({delegate.display_backend})
    </span>
</span>
<table style="color: #616161; font-size: small;">
<tr>
    <td>Depth:</td><td>{source.depth:.2f} m</td>
</tr><tr>
    <td>mnn:</td><td style="align: justify;">{source.mnn:.3e}</td><td>Nm</td>
</tr><tr>
    <td>mee:</td><td style="align: justify;">{source.mee:.3e}</td><td>Nm</td>
</tr><tr>
    <td>mdd:</td><td style="align: justify;">{source.mdd:.3e}</td><td>Nm</td>
</tr><tr>
    <td>mne:</td><td style="align: justify;">{source.mne:.3e}</td><td>Nm</td>
</tr><tr>
    <td>mnd:</td><td style="align: justify;">{source.mnd:.3e}</td><td>Nm</td>
</tr><tr>
    <td>med:</td><td style="align: justify;">{source.med:.3e}</td><td>Nm</td>
</tr>
</table>
'''
        return item.format(idx=self.index.row()+1,
                           delegate=self,
                           source=self.source)


class PyrockoDoubleCoupleDelegate(SourceDelegate):

    __represents__ = 'PyrockoDoubleCouple'

    display_backend = 'pyrocko'
    display_name = 'DoubleCouple'

    parameters = ['easting', 'northing', 'depth', 'store_dir',
                  'strike', 'dip', 'rake', 'magnitude']
    ro_parameters = []

    class DoubleCoupleDialog(PyrockoSourceDialog):

        def __init__(self, *args, **kwargs):
            PyrockoSourceDialog.__init__(
                self, ui_file='pyrocko_double_couple.ui', *args, **kwargs)

    class DoubleCoupleROI(PointSourceROI):

        def __init__(self, *args, **kwargs):
            PointSourceROI.__init__(self, *args, **kwargs)
            self.addRotateHandle([.5, 1.], [0.5, 0.5])
            self.updateROIPosition()

        @QtCore.pyqtSlot()
        def setSourceParametersFromROI(self):
            angle = self.angle()
            strike = float(-angle) % 360
            vec_x, vec_y = self._vectorToCenter(strike)

            parameters = {
                'easting': float(self.pos().x() + vec_x),
                'northing': float(self.pos().y() + vec_y),
                'strike': strike
                }

            self.newSourceParameters.emit(parameters)

        @QtCore.pyqtSlot()
        def updateROIPosition(self):
            source = self.source
            vec_x, vec_y = self._vectorToCenter(source.strike)

            self.setAngle(-source.strike, finish=False)
            self.setPos(
                QtCore.QPointF(source.easting - vec_x,
                               source.northing - vec_y),
                finish=False)
            # self.setPos(QtCore.QPointF(source.easting, source.northing),
            #             finish=False)

        def _vectorToCenter(self, angle):
            rangle = angle * d2r

            sdx = self.size().x()/2
            sdy = self.size().y()/2

            return (sdx*num.sin(rangle) + sdy*num.cos(rangle),
                    sdx*num.cos(rangle) - sdy*num.sin(rangle))

    ROIWidget = DoubleCoupleROI
    EditDialog = DoubleCoupleDialog

    def __init__(self, model, source, index):
        QtCore.QObject.__init__(self)
        self.source = source
        self.model = model
        self.index = index
        self.rois = []

        self.editing_dialog = None

        if model.selection_model is not None:
            self.setSelectionModel()

        self.model.selectionModelChanged.connect(self.setSelectionModel)

    @staticmethod
    def getRepresentedSource(sandbox):
        return PyrockoDoubleCouple(
            store_dir=getConfig().default_gf_dir or '')

    def formatListItem(self):
        item = '''
<span style="font-weight: bold; font-style: oblique">
    {idx}. {delegate.display_name}
    <span style="color: #616161;">
        ({delegate.display_backend})
    </span>
</span>
<table style="color: #616161; font-size: small;">
<tr>
    <td>Depth:</td><td>{source.depth:.2f} m</td>
</tr><tr>
    <td>Strike:</td><td>{source.strike:.2f}&deg;</td>
</tr><tr>
    <td>Dip:</td><td>{source.dip:.2f}&deg;</td>
</tr><tr>
    <td>Rake:</td><td>{source.rake:.2f}&deg;</td>
</tr><tr>
    <td>M<sub>0</sub>:</td><td>{source.moment:.2e}</td>
</tr><tr style="font-weight: bold;">
    <td>M<sub>W</sub>:</td><td>{source.magnitude:.2f}</td>
</tr>
</table>
'''
        return item.format(idx=self.index.row()+1,
                           delegate=self,
                           source=self.source)


class PyrockoRingfaultDelegate(SourceDelegate):
    __represents__ = 'PyrockoRingfaultSource'

    display_backend = 'pyrocko'
    display_name = 'Ringfault'

    parameters = ['store_dir', 'easting', 'northing', 'depth', 'diameter',
                  'strike', 'dip', 'magnitude', 'npointsources']
    ro_parameters = []

    class RingfaultDialog(PyrockoSourceDialog):

        def __init__(self, *args, **kwargs):
            PyrockoSourceDialog.__init__(
                self, ui_file='pyrocko_ringfault.ui', *args, **kwargs)

    class RingfaultROI(PointSourceROI):

        def __init__(self, *args, **kwargs):
            PointSourceROI.__init__(self, *args, **kwargs)
            self.addScaleRotateHandle([.5, 1.], [.5, .5])
            self.updateROIPosition()

        @QtCore.pyqtSlot()
        def setSourceParametersFromROI(self):
            angle = self.angle()
            strike = float(-angle) % 360
            vec_x, vec_y = self._vectorToCenter(strike)

            parameters = {
                'easting': float(self.pos().x() + vec_x),
                'northing': float(self.pos().y() + vec_y),
                'diameter': self.size().y(),
                'strike': strike,
                }

            self.newSourceParameters.emit(parameters)

        @QtCore.pyqtSlot()
        def updateROIPosition(self):
            source = self.source

            self.setAngle(-source.strike, finish=False)
            self.setSize(source.diameter, finish=False)
            vec_x, vec_y = self._vectorToCenter(source.strike)
            self.setPos(
                QtCore.QPointF(source.easting - vec_x,
                               source.northing - vec_y), finish=False)
            # self.setPos(QtCore.QPointF(source.easting, source.northing),
            #             finish=False)

        def _vectorToCenter(self, angle):
            rangle = angle * d2r

            sdx = self.size().x()/2
            sdy = self.size().y()/2

            return (sdx*num.sin(rangle) + sdy*num.cos(rangle),
                    sdx*num.cos(rangle) - sdy*num.sin(rangle),)

    EditDialog = RingfaultDialog
    ROIWidget = RingfaultROI

    def __init__(self, model, source, index):
        QtCore.QObject.__init__(self)
        self.source = source
        self.model = model
        self.index = index
        self.rois = []

        self.editing_dialog = None

        if model.selection_model is not None:
            self.setSelectionModel()

        self.model.selectionModelChanged.connect(self.setSelectionModel)

    @staticmethod
    def getRepresentedSource(sandbox):
        return PyrockoRingfaultSource(
            diameter=10000.,
            store_dir=getConfig().default_gf_dir or '',
            )

    def formatListItem(self):
        item = '''
<span style="font-weight: bold; font-style: oblique">
    {idx}. {delegate.display_name}
    <span style="color: #616161;">
        ({delegate.display_backend})
    </span>
</span>
<table style="color: #616161; font-size: small;">
<tr>
    <td>Depth:</td><td>{source.depth:.2f} m</td>
</tr><tr>
    <td>Diameter:</td><td>{source.diameter:.2f} m</td>
</tr><tr>
    <td>Strike:</td><td>{source.strike:.2f}&deg;</td>
</tr><tr>
    <td>Dip:</td><td>{source.dip:.2f}&deg;</td>
</tr><tr style="font-weight: bold;">
    <td>M<sub>W</sub>:</td><td>{source.magnitude:.2f}</td>
</tr>
</table>
'''
        return item.format(idx=self.index.row()+1,
                           delegate=self,
                           source=self.source)


class PyrockoVLVDSourceDelegate(SourceDelegate):

    __represents__ = 'PyrockoVLVDSource'

    display_backend = 'pyrocko'
    display_name = 'VLVDSource'

    parameters = ['easting', 'northing', 'depth', 'store_dir',
                  'volume_change', 'azimuth', 'dip', 'clvd_moment']
    ro_parameters = []

    class VLVDSourceDialog(PyrockoSourceDialog):

        scaling_params = ['clvd_moment']

        def __init__(self, *args, **kwargs):
            PyrockoSourceDialog.__init__(
                self, ui_file='pyrocko_vlvd_source.ui', *args, **kwargs)

        @QtCore.pyqtSlot()
        def setSourceParameters(self):
            params = {}
            scale = float('1e%d' % self.clvd_moment_exponent.value())
            for param in self.delegate.parameters:
                params[param] = self.__getattribute__(param).value()
                if param in self.scaling_params:
                    params[param] = params[param] * scale
            self.delegate.updateModelParameters(params)

        @QtCore.pyqtSlot()
        def getSourceParameters(self):
            params = self.delegate.getSourceParameters()
            exponent = num.log10(
                num.max([abs(v) for k, v in params.items()
                         if k in self.scaling_params]))
            scale = float('1e%d' % int(exponent))
            self.clvd_moment_exponent.setValue(int(exponent))

            for param, value in params.items():
                if param in self.scaling_params:
                    self.__getattribute__(param).setValue(value / scale)
                else:
                    self.__getattribute__(param).setValue(value)

    class VLVDSourceROI(PointSourceROI):

        def __init__(self, *args, **kwargs):
            PointSourceROI.__init__(self, *args, **kwargs)
            self.addRotateHandle([.5, 1.], [0.5, 0.5])
            self.updateROIPosition()

        @QtCore.pyqtSlot()
        def setSourceParametersFromROI(self):
            angle = self.angle()
            azimuth = float(-angle) % 360
            vec_x, vec_y = self._vectorToCenter(azimuth)

            parameters = {
                'easting': float(self.pos().x() + vec_x),
                'northing': float(self.pos().y() + vec_y),
                'azimuth': azimuth
                }

            self.newSourceParameters.emit(parameters)

        @QtCore.pyqtSlot()
        def updateROIPosition(self):
            source = self.source
            vec_x, vec_y = self._vectorToCenter(source.azimuth)

            self.setAngle(-source.azimuth, finish=False)
            self.setPos(
                QtCore.QPointF(source.easting - vec_x,
                               source.northing - vec_y),
                finish=False)
            # self.setPos(QtCore.QPointF(source.easting, source.northing),
            #             finish=False)

        def _vectorToCenter(self, angle):
            rangle = angle * d2r

            sdx = self.size().x()/2
            sdy = self.size().y()/2

            return (sdx*num.sin(rangle) + sdy*num.cos(rangle),
                    sdx*num.cos(rangle) - sdy*num.sin(rangle))

    ROIWidget = VLVDSourceROI
    EditDialog = VLVDSourceDialog

    def __init__(self, model, source, index):
        QtCore.QObject.__init__(self)
        self.source = source
        self.model = model
        self.index = index
        self.rois = []

        self.editing_dialog = None

        if model.selection_model is not None:
            self.setSelectionModel()

        self.model.selectionModelChanged.connect(self.setSelectionModel)

    @staticmethod
    def getRepresentedSource(sandbox):
        return PyrockoVLVDSource(
            volume_change=.25,
            store_dir=getConfig().default_gf_dir or '')

    def formatListItem(self):
        item = '''
<span style="font-weight: bold; font-style: oblique">
    {idx}. {delegate.display_name}
    <span style="color: #616161;">
        ({delegate.display_backend})
    </span>
</span>
<table style="color: #616161; font-size: small;">
<tr>
    <td>Depth:</td><td>{source.depth:.2f} m</td>
</tr><tr>
    <td>Volume Change:</td><td>{source.volume_change:.2f} km<sup>3</sup></td>
</tr><tr>
    <td>CLVD Azimuth:</td><td>{source.azimuth:.2f}&deg;</td>
</tr><tr>
    <td>CLVD Dip:</td><td>{source.dip:.2f}&deg;</td>
</tr><tr style="font-weight: bold;">
    <td>CLVD M<sub>W</sub>:</td><td>{source.clvd_moment:.2e}</td>
</tr>
</table>
'''
        return item.format(idx=self.index.row()+1,
                           delegate=self,
                           source=self.source)
